<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>返回值</title>
	<script>
		
		// res = prompt("你多少岁？");
	
		function sum(num1,num2) {//形参
			return 200;
		}
		res = sum(25,78);//实参


		document.write(res);


		orderId

		// OrderId

		function is_ou(num) {
			if(num%2==0){
				return true;
			}else{
				return false;
			}
		}
		res = is_ou(265465);
		document.write(res);

		function get_sum(num) {
			var total = 0;

			for (var i = 1; i <= num; i++) {
				total+=i;
			}
			return total;
		}


		res = get_sum(100);

		document.write(res);

	</script>
</head>
<body>
	
</body>
</html>